<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 主体区域 -->
    <el-card>
      <!-- 添加角色区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="dialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
    <!-- 列表 -->
    <el-table :data="rolesList" border stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
          v-for="(item1, i1) in scope.row.children"
          :key="item1.id">
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19" >
              <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                <el-col :span="5">
                  <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <!-- 索引列 -->
      <el-table-column type="index" label="#"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <!-- <template slot-scope='scope'> -->
          <template slot-scope="scope">
            <el-button size="mini" @click="showEditDialog(scope.row.id)" type="primary" icon="el-icon-search">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-search"
            @click="romoveUserById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-search" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        <!-- </template> -->
      </el-table-column>
    </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="dialogVisible"
      width="50%"
      @close="addDialogClosed">
      <el-form ref="addFormRef" :rules="addFormRules" :model="addForm" label-width="100px">
        <el-form-item label='角色名称' prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label='角色描述' prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="editdialogVisible"
      width="50%">
      <el-form ref="editaddFormRef" :rules="editaddFormRules" :model="editForm" label-width="100px">
        <el-form-item label='角色名称' prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label='角色描述' prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="提示"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <el-tree :data="rolelist" :props="rightProps" show-checkbox node-key="id"
      default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      rolesList: [],
      // 控制修改用户对话框的显示与隐藏
      dialogVisible: false,
      editdialogVisible: false,
      // 控制分配权限对话框
      setRightDialogVisible: false,
      // 所有角色列表数据
      rolelist: [],
      // 树形控件的属性绑定对象
      rightProps: {
        children: 'children',
        label: 'authName'
      },
      // 查询到的用户信息对象
      editForm: {},
      // 默认选中的节点ID值数组
      defKeys: [],
      // 添加用户的表单验证
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      editaddForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单验证的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      editaddFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 展开角色的ID
      roleId: ''
    }
  },
  created() {
    this.getrolesList()
  },
  methods: {
    // 获取列表
    async getrolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    // 添加用户
    async addUser () {
      const { data: res } = await this.$http.post('roles', this.addForm)
      if (res.meta.status !== 201) {
        return this.$message.error('添加角色失败')
      }
      this.$message.success('添加角色成功')
      this.dialogVisible = false
      this.getrolesList()
    },
    // 监听用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 显示编辑对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败！')
      }
      this.editForm = res.data
      this.editdialogVisible = true
    },
    // 修改用户
    async editUserInfo() {
      const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
        roleName: this.editForm.roleName,
        roleDesc: this.editForm.roleDesc
      })
      if (res.meta.status !== 200) {
        return this.$message.error('修改用户失败')
      }
      this.editdialogVisible = false
      this.getrolesList()
      this.$message.success('更新用户成功')
    },
    // 删除角色
    async romoveUserById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      // 确定为字符串 confirm
      // 取消为字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功')
      this.getrolesList()
    },
    // 删除角色权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('权限已删除')
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败！')
      }
      this.rolelist = res.data
      // 递归获取三级节点的ID
      this.getleafkeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defkeys 数组中
    getleafkeys (node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getleafkeys(item, arr)
      })
    },
    // 分配权限关闭清除数组
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('授权失败！')
      }
      this.$message.success('授权成功！')
      this.getrolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eeeeee;
}
.bdbottom{
  border-bottom: 1px solid #eeeeee;
}
.vcenter{
  display: flex;
  align-items: center;
}
.el-table{
  margin: 10px 0;
}
</style>
